设全集是实数集R?设全集是实数集R,A={X-½≤X≤3},B=
2015-09-17 02:31:32b***
设全集是实数集R,A={X|½≤X≤3},B={X|2a<x<a+2},若(CrA)∩B≠B,求实数a的取值范围设全集是实数集R?设全集是实数集R,A={X|½≤X≤3},B={X|2axa+2},若(CrA)∩B≠B,求实数a的取值范围:y=-x^2-2?
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2015-09-17 16:53:55
2015-09-17 16:53:55
很赞哦! (243)